State Education Standard. National Association of State Boards of Education.
Цитирование в стиле Чикаго (17-е изд.)State Education Standard. National Association of State Boards of Education.
Цитирование MLA (9-е изд.)State Education Standard. National Association of State Boards of Education.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.